Telemotor-piston.



' R. OGAWA.

TELEMOTOB PISTON. APPLIC TION FILED MAY 24. 1917.

1,281,996. Patented 0 u15,1918.4

, lamping. rings 50 RAISUKE OGAWA, or Kenn, JAPAN.

TELEMOTOR-PISTON.

To allwhom, it may concern: y 5

Bexit knownthat 1,.Rarsnkn Ooawa, a

subject otthe Emperor otJapa-n, residing at 83, Z Chome, Kamitsutsui DortKob have invented certainnew and useful Improvements in Telen otorsPistons, of which the following is a specification.

This invention relates to improvements in pistons and 'more particularly to piston packing for use with telemotor p stons.

The principal object of the inventlon 1s to provide a piston, which is fluid-tight in the cylinder, sothat fluid or the like cannot leap past the piston. L

Anotherpbject of the invention." is to provide a-piston or" this character with adj ustable and'elastic I means for. clamping. cup washers to the piston so that said cup washers will yieldingly engagethecyllnder. A further feature resides in" a construction to uniformly and yieldingly v press the cup washers against the cylinders V p With the foregoing object outlined and with other; objects inview, the invention consists in the novel features hereinafter describedin connection with the accompanying drawing, and more particularly pointed out in the appended claims. 7 Referring to the drawing: I Figure l isa longitudinalsectionalview of the piston and a portion of the piston rod and cylinder taken onjline l lof Figs.

3and4. I a It Fig. 2 is'a half section taken on line II1I of'Figs. 3 and-4;. L H Fig. 3 is an end view looking in the direction of thearrow 1 in Figs. 1 and 2. Fig. 4 is. a similar view looking inthe d rection of the; arrow :11. 1 I

Fig. 5 is an ed'ge viewgof the resilient double ringusedfor holding'the cup washer packingsin place. i I g z 7 Figs. (land Tare detailsof thering, r

Figs. 8 and 9,,are sideglviewsof thering partlyin section.-

. Fig.10 is a transverse sectional viewtaken through the cylinder and piston rod and,

showing an edgeviewof one of the yielding The drawing illustrates atelemotor piston used in the steering of ships but it will be understood that rny iinprovements may be used with pistons forother purposesfiff In the drawing 1 designatesacylinder in which operates a piston rod-2. provided with a flange 15 having an annular extension 12 provided with, arr-inclined face 16 against Specificationof Letters Patent. Patentgdfict. 15, 1918. Application filed May 24,1911. Serial No. 170,629.

which rests the inclined face of a clamping is a cup washer packing 3, which has its Iinner circuniference bearing against the rod 2 and its outer circumference bearing against the inner surface of the cylinder, the 7 web connectingthe circumferences resting between the clainping ringand drum...

The clamping ring 6 is provided with a series of longitudinally disposed apertures 11 and radially disposed slots 17'extendifrom tliese apertures to the periphery of the ring. A'circumferential groove 18 is provided in the ring and in this groove is located a double ring consistingof an inner ring. 5 and an outer ring 4. The rings 4: and 5 are split as shown, in order to make the same resilient, and the ring 4 is provided with a groove'in which the ring 5 rests. As best shown in Figs. 5 to 9, inclusive, the openings between the ends of the rings are arranged out of alinement so that a practically unbroken resilient ring will be provided, which, will bear equally upon all points of the outer circumference of the cup washer packing 3. As shown the opening be tween the ends of the ring 4 are located at one point while the opening 5 between the ends oithe ring'5 arelocated at a different point, and in order to maintain the rings in. this position the ring 4 has a projection 10 which rests in a recess in the ring 5. v

a All of the construction set out in detail,

located'on one side of the drum 7, but as seen in the drawing identical parts, in reversed position, are-placed on the other side of the drum, with the exception that the fixed flange15 is substituted by a nut 8, which engages threads on the rod 2. -A lock nut 9 holds the nutin place and both nuts are used in adjusting the packings.

With this construction, the tightening of the nuts 8 and 9 will cause the inclined faces 16 of the nut 8 and flange 15 to draw the clamping rings 6toward'the rod 2;" and also force said clainping rings into engage- .ment wlth the webs of he washers 3, so that said washers may be tightened after becoming worn. By providing the clamping rings withthe slots l7, said-rings will bear resiliently on the-washers to permit-the same to yield slightly without permitting the leakage of fluid i The double rings will heal uniformly and resiliently upon-the inner surface of the outer circumferences of the cup washers and will maintain the same in yielding contact with the inner surface of the cylinder. Also by this construction the wear on the outer circumferences will be automatically taken up.

Passages 13 are provided in the flange 15 and nut 8 to permit the fluid in the cylinder to enter the spaces between the clamping rings and rod and bear upon the ct ges of the inner circumferences of the washers, to spread the same and proyide a tight joint.

in this invention, the webs of the stuiiing washers are pressed on the urum, the inner circumferences bear on the rod, and the outer circumferences are yieldingly pressed against the inner surface of the cylinder. Therefore, when. for instance, tlie'washers shrink from long use. the wear will be automatically prorided for and perfect watertightness will be kept or maintained. in the known type of pistons, several independent helical springs or one strong spring have or has been employed, as the means for pressing the stutling washers against the cylinder. But, when se eral helical springs are used, they cannot be obtained of equal strength, and when one of them is damaged, it is very ditiicult to geta spring of the same strength to take its place. They are also ditiicult to combine together in fitting and detaching. On the other hand when using only one spring, it mustbe of moderate thickness to give it the requisite strength, and this decreases its yieldability or elastic properties.

In contradistinetion to these known types, my double spring ring enables me to reduce the thickness of each ring, so that in fitting they do not bend beyond the limit of their yieldability, and are never influenced by the shrinkage or expansion of the stuffin washers. Moreover, when one ring only is used, the pressure along the periphery of the ring is irregular owing to the opening between the ends of the ring. But when the ring is formed of two parts, the gap in each of; them can be arranged out of alinement relative to each other, for instance by 90 degrees, so that the pressure due to the elasticity of the ring will be practically uniform.

Vihat I claim and desire to secure by Letters Patent is:

1. The combination with a cylinder, of a piston rod movable therein, and a piston including a cup washer having a web extending transversely of the cylinder, an inner circumference engaging the rod, and an outer circumference engaging the inner surface of the cylinder, and resilient means for holding the outer circumference in engagement with the cylinder.

2. t piston including a rod, a cup washer fiopies this patent may he obtained for arranged upon the rod and consisting of a web extending transi'ersel of the piston and two circumferences concentric with the rod, one of said circumferences engaging the rod and the other adapted to bear upon the inner surface of a cylinder, and resilient means for moving one of the circumferences away from the other.

3. A piston comprising a rod carrying a drum, cup washers surrounding the rod and arranged in reversed positions on opposite sides of the druni, each cup washer including a web which bears upon the drum and two circumferences, one of which engages the rod and the other of which is adapted to bear upon the inner surface of a cylinder, and resilient means for moving one of the circumferences away from the other.

i. A piston including a rod. a cup washer arranged upon the rod and consisting of a web extending transversely of the piston and two circumferences concentric with the rod.

one of said circumferences engaging the rod and the other adapted to bear upon the inner surface of a cylinder, and resilient means including a plural section split ring for moving the outer circumference away from the inner circumference.

5. A piston comprising a rod carrying a drum, a cup washer having a web and two circumferences, said web resting on the drum, and said circumferences engaging the rod and the wall of the cylinder in which the piston is placed, a clamping ring for holding the web against the drum, and one circumference against the rod, and a resilientplural section split ring carried by the clamping ring for holding the other circumference against the cylinder.

6. A piston construction comprising a rod carrying a fixed flange having an inclined face, a drum surrounding the rod and spaced away from the flange, a nut threaded to the rod spaced away from the drum and having an inclined face, clamping rings having inclined faces which engage theinclined faces of the nut and flange, cup washers located between theclamping rings and drum and each having a web held against the drum by its respective ring and two circumferences, the inner of which is 'locatedlbe tween the ring and rod and the outerbeing adapted to bear on the wall of a cylinder,

and plural section resilient rings located'betweenthe clamping rings and outer circumferences of the cup washers.

In testimony whereof I haveherenntosct my hand in presence of two subscribing witnesses.

RAISUKE OGAWVA.

VVitnes's'es:

W. EBIHARAH, A. Amer.

five cents each, addressing the Commissioner of 'Eatents, 

